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Selective Rendering in Mixed-Reality Live Preview?
I'm doing some streaming work using the HoloLens locatable camera, and wanted to be able to encode some information onto the live preview images without it being visible to the actual HoloLens wearer.
Is there any way to render a virtual object in Unity such that it appears on the mixed reality video being captured from the locatable camera, but does not appear to the actual wearer?
In case it helps, my end goal is to be able to encode data (in image form) about the current user head pose as part of the live preview frame, such that we have a good guess about the world-space position of the user's head solely by looking at the video frames. My application requirements are such that I need to be able to know the camera pose of an arbitrary video frame from the locatable camera. The built-in Photo capture methods are unsuitable because they are meant for taking single photos, which is slow. Keeping track of the user's head pose locally in the HoloLens is also less desirable because there are difficulties in synchronizing the current HoloLens head pose with the current video frame a remote viewer is seeing.